Patents by Inventor Chen Demin

Chen Demin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • CONVEX RIDGE TYPE NON-PLANAR CUTTING TOOTH AND DIAMOND DRILL BIT
    Publication number: 20190040689
    Abstract: The present invention provides non-planar cutting tooth and a diamond drill bit. The non-planar cutting tooth and the diamond drill bit have great ability of impact resistance and balling resistance. According to the features of drilled formation, cutting teeth are arranged on the drill bit with different mode, which can improve the mechanical speed and footage of the drill bit.
    Type: Application
    Filed: October 9, 2018
    Publication date: February 7, 2019
    Applicant: CNPC USA CORPORATION
    Inventors: Zhao Liang, Cheng Xiaomin, Chen Demin, Yang Xiongwen, Wang Yonghong, Liu Yu